JP3192290U - Laser distance meter installation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser range finder installation device which can be managed by a small number of people and can measure a concrete filling height of a CFT structure even if there is a structure at the uppermost part of a steel pipe column for filling concrete. An instrument 1 has a holding unit 3 that holds a laser distance meter L so as to emit a laser light LB1 in a first direction D1, and a laser light LB1 emitted from the laser distance meter L in a second direction. A deflecting means 5 for deflecting the laser beam LB2 advancing to D2 and a hole portion 7H for passing the laser beam LB2 were formed by supporting the holding portion 3 at the base end 7A and supporting the deflecting means 5 at the tip end 7B. The support portion 7 and the tip 7B of the support portion 7 can be held inside the steel pipe column through the opening when the support portion 7 and the support portion 7 are provided with an opening, and the second direction D2 is the said. It is provided with an attachment portion 9 that allows the support portion 7 to be attached to the steel tube column so as to face the bottom end of the steel tube column. [Selection diagram] Fig. 1

Description

  The present invention relates to a laser rangefinder installation tool.

  In recent years, a concrete-filled steel pipe structure (hereinafter referred to as CFT structure) has attracted attention as a structural form of high-rise buildings and super-high-rise buildings. CFT construction is a kind of composite structure combining steel and concrete, and does not require rebar or formwork assembly, and is excellent in terms of strength, rigidity, deformation performance, and the like.

  When constructing a CFT column employing CFT structure as a building column, concrete is filled into a concrete filling space such as the inside of a steel pipe column (hereinafter simply referred to as a filling space) by a press-fitting method or a dropping method. In the press-fitting method, as shown in FIG. 4, concrete C is press-fitted in the direction of arrow R1 by a pump or the like from a pressure inlet 31P provided at the lower part of the steel pipe column 31, and the filling space is filled with solidity. During the press-fitting, it is important to manage the press-fitting speed and the filling state so that the press-fitting pressure of the concrete C does not exceed the upper limit of the allowable range. As a method for managing the press-fitting speed of the concrete C, as shown in FIG. 5, there is a method for confirming the leakage amount of the concrete C from the air holes 31Q formed at predetermined intervals in the height direction of the building 33. Can be mentioned. However, in this method, a large number of people are required because a checker is arranged at a predetermined interval, that is, each floor of the building 33. Therefore, in order to manage the press-fitting speed of the concrete C with a small number of people, as shown in FIG. 6, the filling height of the concrete from the direction of the arrow R2 using a laser distance meter (not shown) from the top of the steel pipe column 31. A method of confirming this is adopted.

  For example, Patent Document 1 discloses a sensor used for densely filling a filling space with concrete. The laser distance meter provided in this sensor is disposed at the uppermost part of the filling space, and measures the distance from the top of the concrete that is displaced upward from below when the concrete is placed. After that, the calculation display device that receives the measurement value output from the sensor calculates the concrete filling height accurately and in real time based on the measurement value.

  For example, Patent Document 2 discloses a camera unit in which a laser distance meter is built. This camera unit is suspended from the top of the filling space in a state where it can be raised and lowered, and measures the height from the reference position to the top of the concrete filled in the filling space. By controlling the filling height of the concrete using the camera unit, the concrete is filled up to just below the opening of the steel pipe column, and the condition of the filling space and the height of the top of the concrete are accurately managed.

  Furthermore, for example, Patent Document 3 discloses a concrete filling system including a laser distance meter. This laser rangefinder is provided at the top of the steel pipe column and measures the distance from there to the top of the filled concrete. Based on the distance measured by the laser distance meter, the position of the tube tip of the tremy tube placed in the filling space is accurately grasped, and the press-fitting speed of the concrete is adjusted so that the tip of the steel tube column does not come out from the filled concrete. The

JP 2009-83353 A JP 2013-189810 A JP 2008-75333 A

  However, as shown in FIGS. 7A and 7B, a steel frame 35Z for the heliport 35 may be connected to the top of the CFT column 32 of the building 33 in some cases. In this case, since it is impossible to install a laser rangefinder at the top of the filling space, for example, when using the laser rangefinder disclosed in Patent Documents 1 to 3, the conventional laser rangefinder and concrete are used. There is a problem that the filling height measuring instrument cannot be used.

  The present invention has been made in view of the above problems, and can be managed by a small number of people, and a laser distance meter installation device capable of measuring the CFT concrete filling height even when there is a structure at the top of the filling space. It is an issue to provide.

  The device according to claim 1 is a laser rangefinder installation tool for installing a laser rangefinder used to measure the amount of filling of concrete when filling concrete into a steel pipe column, A holding unit that holds the laser distance meter so as to emit laser light in a first direction; and a deflecting unit that deflects the laser light emitted from the laser distance meter in the second direction from the first direction; A support portion that supports the holding portion at the base end and supports the deflection means at the tip end, and has a hole portion through which the laser beam deflected in the second direction by the deflection means passes; When the steel pipe column is provided with an opening, the tip of the support portion can be held inside the steel pipe column through the opening and the second direction is the bottom end of the steel pipe column. In A mounting portion which can be attached to the support portion to the tubular columns in memorial, characterized in that it comprises.

In the present invention, if an opening is provided on the side surface of the steel pipe column, the support part can be attached to the steel pipe column by the mounting part, and the tip of the support part is inserted and held in the steel pipe column through the opening. When laser light is emitted from the laser distance meter in such a state, the laser light travels in the first direction from the outside to the inside of the steel pipe column. Thereafter, the laser light is deflected from the first direction to the second direction by the deflecting means, passes through the hole, and proceeds in the second direction toward the bottom end of the steel pipe column. Further, the laser beam strikes and reflects the top end of the concrete filled in the steel pipe column, and proceeds in the direction opposite to the second direction toward the upper end of the steel tube column. Then, the laser light strikes the deflecting means, is deflected by the deflecting means in the direction opposite to the first direction, and is received by the laser distance meter. Based on the information of the received laser beam, the filling height of the concrete filled in the steel pipe column is measured by a laser distance meter.
From the above, the concrete filling condition is grasped by the laser distance meter from the side surface of the standing steel pipe column.

  The invention described in claim 2 is characterized in that the deflecting means is supported so as to be rotatable about an axis perpendicular to the first direction and the second direction.

In the present invention, since the deflecting means is supported so as to be rotatable about an axis orthogonal to the first direction and the second direction, it corresponds to the inclination of the top of the concrete filled in the steel pipe column. Thus, the angle of the second direction with respect to the first direction is freely adjusted.
From the above, the angle of the deflecting means with respect to the first and second directions can be finely adjusted. Therefore, even when the top surface including the top of the concrete is slightly inclined with respect to the first direction, the angle of the deflecting means with respect to the first and second directions is finely adjusted and reflected at the top of the concrete. The laser light is deflected in the direction opposite to the first direction by the deflecting means, and is reliably received by the laser distance meter. Therefore, the filling height of the concrete filled in the steel pipe column is more reliably measured by the laser distance meter.

  The invention described in claim 3 is provided with a fall prevention means for preventing the steel pipe column from falling.

  In the present invention, since the fall prevention means is provided, even if the attachment state of the support portion to the steel pipe column by the attachment portion is lost, the fall, damage and breakage of the laser rangefinder can be prevented.

  According to the present invention, there is provided a laser range finder installation tool that can be managed by a small number of people and that can measure the concrete filling height of CFT structure even if there is a structure at the top of the filling space.

It is a perspective view which shows the laser distance meter installation instrument of one Embodiment of this invention. It is sectional drawing which shows the state by which the laser rangefinder installation instrument of one Embodiment of this invention was attached to the steel pipe pillar. It is a perspective view which shows the state where the laser rangefinder installation instrument of one Embodiment of this invention was attached to the steel pipe pillar. It is a schematic diagram for demonstrating the method of press-fitting concrete into the steel pipe pillar made from CFT. It is a schematic diagram for demonstrating the method to measure the filling height of the concrete with which the CFT structure steel pipe pillar was filled. It is a schematic diagram for demonstrating the method to measure the filling height of the concrete with which the CFT structure steel pipe pillar was filled. It is a figure which shows the building where the steel frame for heliports was continuously arranged in the uppermost part of the CFT pillar, (a) is a schematic diagram of the whole building, (b) is an enlarged view of the uppermost part of the CFT pillar.

  Hereinafter, a laser range finder installation apparatus which is an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a laser rangefinder installation instrument (hereinafter simply referred to as an instrument) 1 according to an embodiment of the present invention. The instrument 1 is a laser rangefinder for installing a laser rangefinder L that is used to measure the amount of filling of concrete when filling concrete inside a steel pipe column (not shown) (that is, a filling space). It is an installation tool, and includes at least a holding unit 3, a deflecting unit 5, a support unit 7, and a mounting unit 9. The instrument 1 also includes a connecting portion 11, an attachment assisting portion 13, and a fall prevention means 15.

  The holding unit 3 is for holding the laser distance meter L. The shape of the holding unit 3 is not particularly limited as long as the laser beam LB1 emitted from the laser distance meter L can be emitted in the first direction D1. FIG. 1 illustrates a bowl-shaped holding unit 3 on which a rectangular parallelepiped laser distance meter L can be placed. From the viewpoint of more stably holding the laser distance meter L, it is preferable that suction means (not shown) such as a suction cup, a magnet, and an adhesive tape are attached to the laser distance meter mounting surface 3 a of the holding unit 3.

  The laser distance meter L may be a commercially available one. Specifically, it is an apparatus that emits laser light from a built-in laser diode (not shown) and emits the laser light from a launch port (not shown). In such a form, the method of measuring the distance based on the information of the laser beam reflected and returned by the object to be measured is roughly divided into an optical pulse method, a phase difference detection method, a triangulation method, and an optical interference method. Although it mentions, it is not limited to these methods in particular. In the present embodiment, the measurement object corresponds to the concrete filled in the filling space.

The deflecting means 5 is for deflecting the laser beam LB1 traveling in the first direction D1 to the laser beam LB2 traveling in the second direction D2. Specifically, the deflecting unit 5 is an optical component including a reflecting surface 5r having an area that can be sufficiently irradiated with the laser beam LB1. Examples of the optical component include a mirror and a reflecting prism, but are not particularly limited to these components. The reflecting surface 5r of the deflecting means 5 is supported while being inclined in a third direction D3 that is the central direction of the first direction D1 and the second direction D2. The steel pipe column is erected in a substantially vertical direction, and the upper surface of the concrete in the filling space is considered to be substantially parallel to the first direction D1. The law of reflection, the first direction and the third direction is the angle theta ₁₃ the second direction and the third direction is the angle theta ₂₃ equal, the first direction D1 and the second direction D2 substantially The angles θ ₁₃ and θ ₂₃ are set so as to be approximately 45 °.

However, it is preferable that the deflecting means 5 is supported so as to be rotatable about an axis A orthogonal to the first direction D1 and the second direction D2. As the deflecting means 5 rotates about the axis A, the angles θ ₁₃ and θ ₂₃ are changed, and the angle formed by the first direction D1 and the second direction D2 is changed from 90 °. That is, the traveling direction of the laser beam LB2 can be changed.

  The support part 7 is for supporting the holding part 3 and the deflecting means 5. Specifically, the support part 7 is a bowl-shaped member extending in one direction. The length of the support portion 7 is set to a length that allows the tip 7B of the support portion 7 to be held inside the steel tube column through the opening when the steel tube column is provided with an opening.

  The holding portion 3 is connected to the base end 7 </ b> A of the support portion 7. As described above, the deflecting means 5 is held at the tip 7B of the support portion 7 in a state where the reflecting surface 5r is inclined in the third direction D3 with respect to the first and second directions D1 and D2. With this arrangement, when the laser distance meter L is installed on the holding unit 3 with the launch port directed toward the tip 7B of the support unit 7, the laser beam LB1 is deflected by the deflecting means 5 to become the laser beam LB2. However, if the laser beam LB1 can be deflected by the deflecting means 5 to become the laser beam LB2, the support portion 7 is not limited to the bowl-shaped member illustrated in FIG.

  A hole 7 </ b> H is formed at the tip 7 </ b> B of the support portion 7. The hole 7H is formed to allow the laser beam LB2 to pass through the support portion 7. Therefore, as long as the laser beam LB2 can pass, the size and shape of the hole 7H are not particularly limited. Further, in order to protect the deflection means 5, a glass plate or the like may be provided in the hole 7H.

  The attachment part 9 is for enabling the support part 7 to be attached to the steel pipe column. Any member can be used as the member constituting the attachment portion 9 as long as it can be firmly bonded to the steel pipe column. For example, the magnet base shown in FIG.

  The connection part 11 is for connecting the support part 7 and the attachment part 9 together. One end of the connecting portion 11 is connected to the base end 7A of the support portion 7 by welding or the like. The other end of the connecting portion 11 is connected to the attaching portion 9 by welding or the like. The shape of the connecting part 11 is such that when the steel pipe column is provided with an opening, the shape of the support part 7 and the attachment part 9 is such that the tip 7B of the support part 7 can be held inside the steel pipe column through the opening. It is set in consideration of the size and thickness of the steel pipe column.

  The attachment auxiliary portion 13 is for determining the attachment position of the support portion 7 to the steel pipe column when an opening is provided in the steel pipe column. FIG. 1 illustrates an attachment assisting portion 13 having a refracting portion. In the refracting portion, the attachment auxiliary portion 13 is engageable with the steel pipe column (see FIG. 2).

  In addition, the connection part 11 and the attachment auxiliary | assistant part 13 are omissible. That is, the attachment portion 9 may be directly connected to the bottom surface of the support portion 7 by welding or the like.

  The fall prevention means 15 is for preventing the instrument 1 from falling from the steel pipe column and the laser distance meter L being damaged or broken. Examples of the fall prevention means 15 include an elastic member, the spring illustrated in FIG. A connection means 15X such as a hook is attached to one end of the fall prevention means 15. The other end of the fall prevention means 15 is connected to the attachment portion 9. The fall prevention means 15 can be connected to the steel pipe column by a method such as hooking the connection means 15X on an appropriate place of the steel pipe column when the instrument 1 is attached to the steel pipe column. However, even if the attachment state of the support portion 7 to the steel pipe column by the attachment portion 9 is lost, the connection means 15X can be omitted if it is composed of a member or the like that can absorb the impact applied to the instrument 1 at that time. The form of the prevention means 15 is not particularly limited. Although the fall prevention means 15 can be omitted, even if the attachment state of the support portion 7 to the steel pipe column is suddenly lost, the impact applied to the instrument 1 at that time is absorbed, the instrument 1 falls, and the laser distance meter L From the viewpoint of preventing damage and breakage, the fall prevention means 15 is preferably provided in the instrument 1.

  Next, a method of using the instrument 1 of the present embodiment will be described with reference to the drawings.

2 and 3 are views showing a state in which the instrument 1 is attached to the steel pipe column 21, FIG. 2 is a cross-sectional view, and FIG. 3 is a perspective view. In FIG. 2, the illustration of the fall prevention means 15 is omitted.
First, a steel pipe column 21 for constructing a CFT column is prepared and erected at a predetermined position on the ground or a building. The inside of the steel pipe column 21 is a filling space S in which the concrete C is filled. Next, an opening 21 </ b> H is formed at an appropriate location on the side surface of the steel pipe column 21. The size and shape of the opening 21H are set so that the tip 7B of the support portion 7 can be inserted and pulled out. It is preferable that the opening 21H is formed in advance before the steel pipe column 21 is erected.

  Next, the support portion 7 is inserted into the opening 21H from the tip 7B, and the attachment portion 9 is brought into close contact with the outer surface of the steel pipe column 21 by a method such as bringing the magnet of the magnet base into contact with the steel tube column 21. The 13 refraction portions are engaged with the steel pipe column 21 on the lower end side of the opening 21H, and the tip 7B is installed in the filling space S. Further, the connecting means 15X is hooked on the protruding portion of the steel pipe column 21 or the like. By the work so far, as shown in FIG. 2 and FIG. 3, the instrument 1 is in a state of being attached to the steel pipe column 21 (hereinafter referred to as “attached state”).

  Next, the laser distance meter L is installed in the holding unit 3, and the laser light LB 1 is emitted from the laser distance meter L in the first direction D 1. Thereby, the laser beam LB1 hits the reflection surface 5r, is reflected, and becomes the laser beam LB2. The laser beam LB2 passes through the hole 7H and travels in the filling space S along the second direction D2 toward the bottom end 21d of the steel pipe column 21 and the top end Ca of the concrete C.

  The laser beam LB2 hits the top end Ca, is reflected, and becomes the laser beam LB3 that travels in the direction opposite to the second direction D2. The laser beam LB3 travels in the filling space S along the opposite direction, passes through the hole 7H, is reflected by the reflection surface 5r, and becomes the laser beam LB4 that travels in the direction opposite to the first direction D1. The laser distance meter L receives the laser beam LB4, and emits the laser beam LB1 having a wavelength common to the laser beams LB1, LB2, LB3, and LB4 by a built-in calculation means (not shown) until the laser beam LB4 is received. The filling height of the concrete C in the filling space S is calculated from each information such as the time. The calculated filling height of the concrete C is displayed on a display means (not shown) or the like. Based on this principle, the filling height of the concrete C in the filling space S is measured by the laser distance meter L.

In many cases, since the upper surface of the concrete C including the top end Ca is substantially parallel to the first direction D1, the first direction D1 and the second direction D2 form a right angle, and the angles θ ₁₃ and θ ₂₃ are What is necessary is just to set so that it may become equal. However, if the traveling direction of the laser beam LB4 is tilted with respect to the first direction D1, for example, because the upper surface is tilted with respect to the first direction D1 or dust adheres to the top end Ca, the laser beam LB4. May occur where the laser distance meter L does not receive the light. In such a case, the deflecting means 5 is slightly rotated around the axis A, and the angle of the deflecting means 5 with respect to the first and second directions D1 and D2 is finely adjusted, that is, the angles θ ₁₃ and θ ₂₃ are slightly adjusted. And the traveling direction of the laser beam LB4 and the first direction D1 may be made parallel to each other.

  Through the above operations, the user of the instrument 1 measures the filling height of the concrete C in the filling space S, grasps the filling amount and filling state of the concrete C in the filling space S, and determines the press-fitting speed of the concrete C, etc. to manage. When a plurality of steel pipe columns 21 are erected, the filling height of the concrete C at each opening 21H is measured in the same manner as the above operation.

  The instrument 1 of the present invention described above is a laser distance meter installation instrument that includes a holding unit 3, a deflecting unit 5, a support unit 7, and a mounting unit 9. That is, the laser distance meter L is held by the holding unit 3 so that the laser beam LB1 is emitted in the first direction D1. The laser beam LB1 is deflected in the second direction D2 by the deflecting means 5. The support unit 7 supports the holding unit 3 and the deflecting unit 5 and the laser beams LB2 and LB3 pass through the hole 7H. By the attachment portion 9, the tip 7B can be held in the filling space S, and the support portion 7 can be attached to the steel pipe column 21 so that the second direction D2 faces the bottom end 21d. Thereby, the opening 21H is provided on the side surface of the steel pipe column 21, and when the mounting is completed, the laser beam LB1 emitted from the laser distance meter L proceeds in the first direction D1, is deflected, and the top end of the concrete C The light hits Ca, reflects, travels in the opposite direction to the first direction D1, and is received by the laser distance meter L. That is, the laser beam reciprocates between the side of the steel pipe column 21 and the concrete C filled in the filling space S through the side surface of the steel pipe column 21, and the filling height of the concrete C can be measured. As a result, it is possible to measure the filling height of the concrete C by the laser distance meter L from the side surface of the standing steel pipe column 21 and grasp the filling amount and filling state of the concrete C. The user of the appliance 1 can measure the filling height of the concrete C by a simple operation, grasp the filling amount and filling state of the concrete C, and can manage the press-fitting speed and filling state of the concrete C. Therefore, a laser range finder installation tool that can be managed by a small number of people and can measure the CFT concrete filling height even when there is a structure at the top of the filling space S is provided. In addition, the work efficiency in constructing the CFT structure is significantly improved.

Moreover, according to the instrument 1 of the present invention, the deflection means 5 is supported so as to be rotatable about the axis A. Therefore, the user of the instrument 1 can easily finely adjust the angles θ ₁₃ and θ ₂₃ of the deflecting unit 5 by rotating the deflecting unit 5 around the axis A. Therefore, even if the traveling direction of the laser beam LB4 is slightly inclined with respect to the first direction D1 and the laser beam LB4 is not received by the laser distance meter L, the traveling direction of the laser beam LB4 The laser distance meter L can reliably receive the laser beam LB4 so that the direction D1 of the laser beam is parallel. Thereby, the measurement accuracy of the filling height of the concrete C is further improved.

  The device 1 of the present invention is provided with a fall prevention means 15. Therefore, even if the attachment state of the support part 7 to the steel pipe column 21 by the attachment part 9 is lost, the connection state between the instrument 1 and the steel pipe pillar 21 is maintained by the fall prevention means 15 and the instrument 1 The applied impact is absorbed and the instrument 1 is prevented from dropping from the steel pipe column 21. Therefore, the laser distance meter L can be reliably prevented from falling, damaged and broken.

  The preferred embodiments of the present invention have been described in detail above. However, it is possible to make changes within the scope without departing from the spirit of the present invention, or to replace the components in the above embodiments with known components.

1 equipment (laser distance meter installation equipment)
DESCRIPTION OF SYMBOLS 3 Holding | maintenance part 5 Deflection means 7 Support part 7A Base end 7B Tip 7H Hole 9 Attachment part 15 Fall prevention means 21,31 Steel pipe pillar 21H Opening 21d Bottom end A Axis C Concrete D1 First direction D2 Second direction L Laser Distance meter LB1, LB2, LB3, LB4 Laser light S Filling space (inside of steel pipe column)

Claims (3)

A laser rangefinder installation tool for installing a laser rangefinder used to measure the amount of filling of concrete when filling concrete inside a steel pipe column,
A holding unit for holding the laser distance meter so as to emit laser light in a first direction;
Deflecting means for deflecting laser light emitted from the laser distance meter from the first direction to the second direction;
A support portion that supports the holding portion at the base end and supports the deflection means at the tip end, and is formed with a hole through which the laser beam deflected in the second direction by the deflection means passes;
When the steel pipe column is provided with an opening, the tip of the support portion can be held inside the steel pipe column through the opening and the second direction is the bottom end of the steel pipe column. An attachment part that allows the support part to be attached to the steel pipe column so as to face
A laser range finder installation device characterized by comprising:   2. The laser rangefinder installation device according to claim 1, wherein the deflecting unit is supported by the support portion so as to be rotatable about an axis perpendicular to the first direction and the second direction. .   The laser distance meter installation device according to claim 1 or 2, further comprising a fall prevention means for preventing the steel pipe column from falling.

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